As much as the world needs to preserve forests to slow the rise of global temperatures, planting more trees won’t solve the problem if emissions aren’t cut and deforestation continues.

What can planting a tree do to save the world?

A lot – and at the same time, not enough.

That’s the landscape laid out by a host of experts as the United States reaches its 150th Arbor Day, in a world drastically changed from 1872, when Nebraska newspaper editor J. Sterling Morton first proposed the holiday observed on the last Friday of April.

 

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